Hi Joe,

What version of PBP are you using?

Your first version should work just fine. FOR letters = STRING[0] to STRING[9] is essentially
the same as FOR letters = "A" to "J", which works the same.

This;
Code:
DEFINE OSC 20
INCLUDE "modedefs.bas"
LETTERS VAR BYTE
String VAR BYTE[10]
string[0]= "A"
string[1]= "B"
string[2]= "C"
string[3]= "D"
STRING[4]= "E"
STRING[5]= "F"
STRING[6]= "G"
STRING[7]= "H"
STRING[8]= "I"
STRING[9]= "J"

loop:
    FOR letters = STRING[0] to STRING[9]
     SEROUT PORTC.6,T9600,["string is ",(LETTERS),13,10]
     PAUSE 500
    NEXT letters
    GOTO loop

    END
Outputs this;
Code:
string is A
string is B
string is C
string is D
string is E
string is F
string is G
string is H
string is I
string is J
string is A
string is B
string is C
string is D, etc, etc,